ARRANJO E CONDUÇÃO NO CRESCIMENTO E PRODUÇÃO DO MARACUJAZEIRO AMARELO SOB ADUBAÇÃO ORGANOMINERAL

Abstract

The adoption of crop forms and the use of balanced organomineral fertilization may be relevant strategies in the search for cost reduction and increase of yield in passion fruit cultivation. The work was developed to evaluate the growth and production of yellow passion fruit as a function of nitrogen doses, organic matter as well as arrangement and production. The experiment was installed in August 2017, located at coordinates (7 00 '04 "south latitude, 35 ° 47' 54" longitude west of Greenwich Meridian and 558 m altitude). The treatments were obtained based on the Central Compound matrix of Box, through the combination of five doses of nitrogen (50, 65, 100, 135 and 150% of the recommended for one plant per pit with an additional 25% increase per plant in the pit) and five levels of organic matter in the soil (1.3, 1.8, 2.9, 4.0 and 4.5%). To evaluate the effect of the number of plants per pit were added three treatments being one, two and six plants per pit all with a level of 2.9% organic matter in the soil and 100% of the nitrogen recommended for cultivation with one plant per pit with growth of 25% per additional plant. The treatments were distributed in a randomized block design, with two pits in the plot. The variables analyzed were stem diameter (for use in the logistic growth model), plant height, number of fruits, fruit harvest and weighing to obtain (yield per plant, and productivity). The data were submitted to statistical analysis performed with SAS University Edition software. The logistic growth estimates were adjusted to the standard of the readings presented, with a stabilization of growth after 270 days of transplanting. The increase in the number of plants per hole caused a decrease in production per plant (kg), with a mean of 29.7, 24.7, 28.0 and 15.6 kg per plant being observed for the one, two, three and six plants per pit respectively. The level of organic matter of 1.3% in the Regolítico Neosol is adequate for the cultivation of yellow passion fruit. For the crop, we recommended the dose of 275 kg ha-1 of N, in the arrangement with three plants per well.